A few notes:
-With the amount of enemies spawned, it is effectively impssible to avoid their bullets, even with speed and rotation upped.
-Controls seem almost like they are delayed a whole second.
-Enemies seem way more maneuverable than the player.

Nifty things:
-It's enjoyable taking on so many enemy planes.
-It seems like over time, you gain more skill points? Or perhaps it's based on score instead of time?
-The explosion sound effect is satisfying; I enjoy taking on multiple planes and blowing several of them up.

Overall seems like a functional and well executed game, though the plane is difficult to control and feels very slow without any upgrades. I'd say start out with a plane that feels "normal" then have the upgrades add more from there.

I don't really see how evolution fits in, other than just as a button label. It really is just upgrades. Also, I can't help but notice the aesthetic and gameplay seem quite heavily inspired from Vlambeer's LUFTRAUSERS... which might not have been as apparent if the theme was better incorporated.